Concrete railway-tie.



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CONCRETE RAILWAY TIE APPLICATION FILED OCT. 11, l9l6'.

Patented May 22, 1917.

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UNITED STATES LEANDEIR DUNCAN, 0F BUTTE, MONTANA.

ooncnn'rn RAILWAY-TIE.

Specification of Letters Patent.

Patented May 22, 1917.

Application filed October 11, 1916. Serial No. 125,011.

To all whom it may concern:

Be it known that I, LEANDER DUNCAN, a citizen of the United States, anda resident of Butte, in the county of Silverbow and State of Montana,have invented a new and Improved Concrete Railway-Tie, of which thefollowing is a full, clear, and exact description.

This invention relates to railroad construction and has particularreference to cross ties for railway rails.

Among the objects of the invention is to provide an improved form ortype of ties, the same being of composite nature, the body portion ofwhich is concrete suitably reinforced, but with special provision forattachment of the rails thereto.

Another object of the invention is to improve the construction ofrailway ties covered by Letters Patent of the United States, issued tome on August 22, 1916, No. 1,195,791. The improvement consists primarilyin means whereby the attachment portion of the tie will be of a strongeror more reliable nature.

With the foregoing and other objects in view the invention consists inthe arrangement and combination of parts hereinafter described andclaimed, and while the invention is not restricted to the exact detailsof construction disclosed or suggested herein, still for the purpose ofillustrating a practical embodiment thereof reference is had to theaccompanying drawings, in which like reference characters designate thesame parts in the several views, and in which Figure 1 is a plan view ofmy improved tie showin the rails in place but with the pillow bloc: ofone rail in horizontal section on the line 11 of Fig. 2;

Fig. 2 is a vertical central longitudinal section on the line 22 of Fig.1;

Fig. 3 is a vertical transverse section on the line 33 of Fig. 2; and

Fig. 4 is a perspective view of the sheet metal supporting casing forthe cushion.

Referring now more particularly to the drawings, I show a cross tie forrailway rails constructed mainly of concrete 10 from one end to theother and at 11 and 12 are pairs of upper and lower reinforcement rodsextending likewise from one end of the cross tie to the other, therebystrengthening the concrete and making a device of suitable strength at amoderate price.

I will now describe the means for supporting and attaching rails, andsince this part of the invention is the same at both ends of the tie, Iwill confine my descrip tion accordingly, it being understood that asimilar description will apply to both ends of the tie.

As shown bestin Fig. 4, I provide a sheet metal casing 13 formed from asingle strip \of sheet metal, but so'bent as to provide a bottom panel14, parallel vertical panels 15 and horizontal end panels 16, lying inthe same plane but projecting oppositely from each other horizontally atthe middle of the tie vertically. The bottom panel 14 lies flush withthe bottom of the tie, but is of less width than the whole tie, asindicated in Fig. 3. The vertical panels 15 are provided with holes 17through which the rods 12 pass. By this means the rods hold the casingsin proper position during the formation of the tie and the setting ofthe concrete, and also the interlocking of the rods and the casingstructures assures a maximum strength for the completed article. Theembedding of the ends 16 in the concrete likewiseserves to stiffen thestructure and prevent any possibility of displacement downwardly of thecasing in practice.

At 18, I show a cushion which may be of wood or some other suitablematerial supported directly upon the upper surface of the bottom panel14, but of less width than the space between the rods 12. In otherwords, in the format-ion of the concrete, a space of rectangular form isprovided between the edge portions of the casing. As indicated plainly,therefore, in Fig. 3, the cushion is of less width than the casing.

20 indicates a pillow block of cast metal or its equivalent having abase fitted within the above mentioned cushion space and restingsquarely upon the upper surface of the cushion. Said pillow block, as inmy prior patent, is provided with a pair of uprights 21 extendingupwardly on opposite sides of the base flange of the rail, clampingmeans 22 and 23 being provided to secure the rail in place between them.

24 indicates a plurality of bolts extending upwardly from the bottompanel 24 through vertically alined holes 26 and 27 in the cushion andpillow block respectively. These bolts serve to clamp the pil- :20prising a metal casing, the opposite end 10W block and cushion snuglyWithin the cavity 19 and connect them permanently to the bottom of thecasing, although by removing the nuts from the bolts 24, these parts maybe removed or replaced When necessary, the casing, however, beingimmovably connected to the body of the tie.

With the cushion blocks 18 made of Wood, I prefer that they be suitablyimpregnated With creosote or some other preservative to.

prolong their period of usefulness.

I claim:

1. The herein described reinforced concrete railway tie, the samecomprising a body portion of concrete from one end of the tie to theother, the reinforcement means comprising a-plurality of rodscoextensive in length with the tie, said tie'having adjacent each endrail attachment means com- Ocpies of this patent may be obtained forfive cents each, by addressing the Commissioner of Patents,

portions of which are interlocked With the concrete reinforcement means,a cushion supported upon the bottom of the casing and a pillow blocksecured upon the upper surface of the cushion.

2. The herein described cross tie for rail- Ways comprising a bodystructure of concrete having longitudinal reinforcement rods extendingtherethrough from one end to the other, a sheet metal casingsecured ineach end of the body portion of the tie, a portion of said rods passingthrough both ends of the casing and locking the same in position, acushion" supported upon the bottom of the casing and lying between saidlocking rods, and a'pilloW block anchored upon the upper surface of thecushion.

LEANDER DUNCAN.

Washington, D. G.

